add copyright file and "person" in description

Author: nmdefries

DESCRIPTION

@@ -16,13 +16,15 @@ Authors@R: c(
     person("Dmitry", "Shemetov", role = "ctb"),
     person("Ryan", "Tibshirani", , "[email protected]", role = c("aut", "cre")),
     person("Lionel", "Henry", role = "ctb", comment = "Author of included rlang fragments"),
-    person("Hadley", "Wickham", role = "ctb", comment = "Author of included rlang fragments")
+    person("Hadley", "Wickham", role = "ctb", comment = "Author of included rlang fragments"),
+    person("Posit", role = "cph", comment = "Copyright holder of included rlang fragments")
   )
 Description: This package introduces a common data structure for epidemiological
     data reported by location and time, provides another data structure to
     work with revisions to these data sets over time, and offers associated
     utilities to perform basic signal processing tasks.
 License: MIT + file LICENSE
+Copyright: file COPYRIGHTS
 Imports:
     cli,
     data.table,

inst/COPYRIGHTS

@@ -0,0 +1,26 @@
+Copyright for most of the included code is held by the Delphi group.
+
+Posit is the copyright holder for `rlang` fragments included in the
+`as_slide_computation` function in `utils.R` under the following license.
+
+# MIT License
+
+Copyright (c) 2020 rlang authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.